Tag Archives: monterey vector control

A viral disease called chickungunya is now being spread by mosquitoes in the US. Oh great…one more thing to worry about with mosquito bites.

Chikungunya (CHIKV) is transmitted via the bite of an infected mosquito. Most common are the mosquito types on this photos (Aedes spp., predominantly Aedes aegypti and Ae. albopictus). These mosquitos are the same type that spread dengue fever. They bite in the daytime. Photo via CDC website.

Have you heard about chickungunya?

The first outbreak of the disease was in southern Tanzania in 1952. The name ‘chikungunya’ is from a word in the Kimakonde language (spoken in southern Tanzania and northern Mozambique) that means “to become contorted” or “that which bends up”.

It describes the stooped appearance of sufferers with joint pain. Signs and symptoms also include a sudden start of fever often accompanied by joint pain. Other symptoms are muscle pain, headache, nausea, fatigue and rash. The joint pain is often very debilitating, but usually lasts for a few days.

Most infected patients recover fully, but in some cases joint pain may persist for several weeks or months, or even years. The good news is that deaths from chikungunya are rare.

Countries where chikungunya virus transmitted – map via the US CDC

According to the Center for Disease Control and Prevention (CDC), chikungunya (CHIKVI) has occurred in Africa, Southern Europe, Southeast Asia, and islands in the Indian and Pacific Oceans.

In late 2013, CHIKVI was found for the first time on islands in the Caribbean.

Since then, CHIKVI has been found in multiple countries or territories in the Caribbean, Central America, or South America, and now in the US.

NOTE: In California, the mosquito Aedes albopictus(one of the types that spread CHIKV) are found in Southern and Central California.

Its habitat are small containers and old tires.

As there are no known vaccine or medication, the CDC advice is to reduce your exposure by:

staying indoors

using mosquito repellent on exposed skins

Wearing long-sleeved shirts and long pants

Considering permethrin-treated clothing (Permethrin is a pesticide that kills or repels mosquitos and ticks. More information on permethrin at the National Pesticide Information Center)

There are currently no antiviral medicines to treat the chikungunya virus. However, there are medicines to reduce the fever and pain experienced by those exposed to the virus. For more details, visit the CDC’s website about chikungunya, here.

The yellow fever mosquito, Aedes aegypti is a mosquito that can spread the dengue fever, chikungunya and yellow fever viruses, and other diseases. The mosquito can be recognized by white markings on legs and a marking in the form of a lyre on the thorax. The mosquito originated in Africa but is now found in tropical and subtropical regions throughout the world, now including many parts of California.

And by the way, there is also a measles outbreak now, which originated in the Philippines! Over forty-thousand cases were reported in the Philippines between January to May, 2014. More on the measles outbreak, here, including information on what travelers can do to protect themselves if traveling to the Philippines.